49ers TE Davis unlikely to play Sunday

San Francisco 49ers tight end Vernon Davis is questionable to play Sunday against the Arizona Cardinals, but the San Francisco Chronicle reported that he will most likely not play.

Davis told reporters Friday that he wants to play but did not seem optimistic about it.

Davis is still recovering from a concussion he sustained against the Seattle Seahawks last Sunday. He wore a black non-contact jersey during practice Friday. He still has to pass a simulated contact test before he can be cleared to play.

Coach Jim Harbaugh said that Davis was "on course" to play, but the Chronicle reported that Davis did not sound like a player expecting to return to action during an interview after practice. He said he felt "OK" and " all right" and that he was "taking it easy" during practice.

When asked if he is confident about playing Sunday, Davis said, "A little bit. I know my teammates are, but I've just got to get a little more comfortable."

The 49ers' receiving corps has thinned out with Mario Manningham and Kyle Williams out. Michael Crabtree is the only available receiver with more than Davis' 40 catches this season. Crabtree has 77 receptions.